/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkComposeShader_DEFINED
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#define SkComposeShader_DEFINED
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#include "SkShaderBase.h"
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#include "SkBlendMode.h"
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class SkComposeShader final : public SkShaderBase {
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public:
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SkComposeShader(sk_sp<SkShader> dst, sk_sp<SkShader> src, SkBlendMode mode, float lerpT)
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: fDst(std::move(dst))
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, fSrc(std::move(src))
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, fLerpT(lerpT)
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, fMode(mode)
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{
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SkASSERT(lerpT >= 0 && lerpT <= 1);
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}
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#if SK_SUPPORT_GPU
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std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
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#endif
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#ifdef SK_DEBUGx
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SkShader* getShaderA() { return fShaderA.get(); }
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SkShader* getShaderB() { return fShaderB.get(); }
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#endif
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#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
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bool asACompose(ComposeRec* rec) const override;
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#endif
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protected:
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SkComposeShader(SkReadBuffer&);
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void flatten(SkWriteBuffer&) const override;
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sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override;
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bool onAppendStages(const StageRec&) const override;
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private:
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SK_FLATTENABLE_HOOKS(SkComposeShader)
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sk_sp<SkShader> fDst;
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sk_sp<SkShader> fSrc;
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const float fLerpT;
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const SkBlendMode fMode;
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bool isJustMode() const { return fLerpT == 1; }
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bool isJustLerp() const { return fMode == SkBlendMode::kSrc; }
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typedef SkShaderBase INHERITED;
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};
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#endif
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